Teuchos_VerboseObject.hpp

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//                    Teuchos: Common Tools Package
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#ifndef TEUCHOS_VERBOSE_OBJECT_HPP
#define TEUCHOS_VERBOSE_OBJECT_HPP

#include "Teuchos_RCP.hpp"
#include "Teuchos_FancyOStream.hpp"
#include "Teuchos_VerbosityLevel.hpp"


namespace Teuchos {


class TEUCHOSCORE_LIB_DLL_EXPORT VerboseObjectBase {
public:



  static void setDefaultOStream( const RCP<FancyOStream> &defaultOStream );

  static RCP<FancyOStream> getDefaultOStream();




  virtual ~VerboseObjectBase();

  explicit
  VerboseObjectBase(
    const RCP<FancyOStream> &oStream = Teuchos::null
    );

  virtual const VerboseObjectBase& setOStream(
    const RCP<FancyOStream> &oStream) const;

  virtual const VerboseObjectBase& setOverridingOStream(
    const RCP<FancyOStream> &oStream) const;

  virtual VerboseObjectBase& setLinePrefix(const std::string &linePrefix);




  virtual RCP<FancyOStream> getOStream() const;

  virtual RCP<FancyOStream> getOverridingOStream() const;

  virtual std::string getLinePrefix() const;




  virtual OSTab getOSTab(const int tabs = 1, const std::string &linePrefix = "") const;


protected:

  void initializeVerboseObjectBase(
    const RCP<FancyOStream> &oStream = Teuchos::null
    );

  virtual void informUpdatedVerbosityState() const;

private:

  std::string thisLinePrefix_;

//use pragmas to disable some false-positive warnings for windows sharedlibs export
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable:4251)
#endif
  mutable RCP<FancyOStream> thisOStream_;
  mutable RCP<FancyOStream> thisOverridingOStream_;
#ifdef _MSC_VER
#pragma warning(pop)
#endif

  static RCP<FancyOStream>& privateDefaultOStream();

};


template<class ObjectType>
class VerboseObject : virtual public VerboseObjectBase {
public:


  static void setDefaultVerbLevel( const EVerbosityLevel defaultVerbLevel);

  static EVerbosityLevel getDefaultVerbLevel();



  explicit
  VerboseObject(
    const EVerbosityLevel verbLevel = VERB_DEFAULT,  // Note, this must be the same as the default value for defaultVerbLevel_
    const RCP<FancyOStream> &oStream  = Teuchos::null
    );

  virtual const VerboseObject& setVerbLevel(
    const EVerbosityLevel verbLevel) const;

  virtual const VerboseObject& setOverridingVerbLevel(
    const EVerbosityLevel verbLevel) const;



  virtual EVerbosityLevel getVerbLevel() const;


protected:

  void initializeVerboseObject(
    const EVerbosityLevel verbLevel = VERB_DEFAULT,
    const RCP<FancyOStream> &oStream  = Teuchos::null
    );

private:

  mutable EVerbosityLevel thisVerbLevel_;
  mutable EVerbosityLevel thisOverridingVerbLevel_;

  static EVerbosityLevel& privateDefaultVerbLevel();

};


template<class ObjectType>
class VerboseObjectTempState {
public:
  VerboseObjectTempState(
    const RCP<const VerboseObject<ObjectType> > &verboseObject,
    const RCP<FancyOStream> &newOStream,
    const EVerbosityLevel newVerbLevel
    ):
    verboseObject_(verboseObject),
    oldVerbLevel_(VERB_DEFAULT)
    {
      if(verboseObject_.get()) {
        oldOStream_ = verboseObject_->getOStream();
        oldVerbLevel_ = verboseObject_->getVerbLevel();
        verboseObject_->setOStream(newOStream);
        verboseObject_->setVerbLevel(newVerbLevel);
      }
    }
  ~VerboseObjectTempState()
    {
      if(verboseObject_.get()) {
        verboseObject_->setOStream(oldOStream_);
        verboseObject_->setVerbLevel(oldVerbLevel_);
      }
    }
private:
  RCP<const VerboseObject<ObjectType> > verboseObject_;
  RCP<FancyOStream> oldOStream_;
  EVerbosityLevel oldVerbLevel_;
  // Not defined and not to be called
  VerboseObjectTempState();
  VerboseObjectTempState(const VerboseObjectTempState&);
  VerboseObjectTempState& operator=(const VerboseObjectTempState&);
};


// //////////////////////////////////
// Template defintions


//
// VerboseObject
//


// Public static member functions


template<class ObjectType>
void VerboseObject<ObjectType>::setDefaultVerbLevel( const EVerbosityLevel defaultVerbLevel)
{
  privateDefaultVerbLevel() = defaultVerbLevel;
}


template<class ObjectType>
EVerbosityLevel VerboseObject<ObjectType>::getDefaultVerbLevel()
{
  return privateDefaultVerbLevel();
}


// Constructors/Initializers


template<class ObjectType>
VerboseObject<ObjectType>::VerboseObject(
  const EVerbosityLevel verbLevel,
  const RCP<FancyOStream> &oStream
  )
  : thisOverridingVerbLevel_(VERB_DEFAULT)
{
  this->initializeVerboseObject(verbLevel,oStream);
}


template<class ObjectType>
void VerboseObject<ObjectType>::initializeVerboseObject(
  const EVerbosityLevel verbLevel,
  const RCP<FancyOStream> &oStream
  )
{
  thisVerbLevel_ = verbLevel;
  this->initializeVerboseObjectBase(oStream);
}


template<class ObjectType>
const VerboseObject<ObjectType>&
VerboseObject<ObjectType>::setVerbLevel(const EVerbosityLevel verbLevel) const
{
  thisVerbLevel_ = verbLevel;
  informUpdatedVerbosityState();
  return *this;
}


template<class ObjectType>
const VerboseObject<ObjectType>&
VerboseObject<ObjectType>::setOverridingVerbLevel(
  const EVerbosityLevel verbLevel
  ) const
{
  thisOverridingVerbLevel_ = verbLevel;
  informUpdatedVerbosityState();
  return *this;
}


// Query functions


template<class ObjectType>
EVerbosityLevel VerboseObject<ObjectType>::getVerbLevel() const
{
  if (VERB_DEFAULT != thisOverridingVerbLevel_)
    return thisOverridingVerbLevel_;
  if (VERB_DEFAULT == thisVerbLevel_)
    return getDefaultVerbLevel();
  return thisVerbLevel_;
}


// Private static members


template<class ObjectType>
EVerbosityLevel& VerboseObject<ObjectType>::privateDefaultVerbLevel()
{
  static EVerbosityLevel defaultVerbLevel = VERB_DEFAULT;
  return defaultVerbLevel;
}


} // namespace Teuchos


#endif // TEUCHOS_VERBOSE_OBJECT_HPP